My GShock

MASTER OF G MUDMASTER This radio solar model from the G-SHOCK MUDMASTER series is intended for extreme on-land use in terrains strewn with rocks, sand, and debris. Features a dust- and mud-proof structure needed for missions in dirt, sand, and mud. A large number of gaskets built into the buttons and shafts prevent mud intrusion. A vibration-resistant structure makes it able to withstand the use of large pieces equipment such as electric cutters or crushers. It is also equipped with a triple sensor that displays information on orientation, atmospheric pressure/altitude, and temperature. High visibility is also ensured via large indices with Arabic numerals, a double LED light, and a wind-proof sapphire glass crystal. The band is textured to resemble the non-slip grip of a piece of heavy machinery, and the extra-thick hour and minutes hands have an arrow feather motif. Checkering is applied to all buttons to improve operability and to provide a finish that exudes a military feel. A G-SHOCK that supports tough men on harsh land missions.



Case size (L× W× H)
56.7 × 56.1 × 18 mm
119 g
Case and bezel material
Case / bezel material: Resin / Stainless steel
Resin Band
Shock Resistant
Vibration resistant
Mud Resistant
Water resistance
200-meter water resistance
Time adjustment
Radio-controlled Watch; Multi band 6
Power supply and battery life
Tough Solar (Solar powered)
Sensor feature
Altimeter Measuring range: -700 to 10,000 m ( -2,300 to 32,800 ft.) Measuring unit: 1 m (5 ft.) Hand indication of altitude differential Manual memory measurements (up to 30 records, each including altitude, date, time) Auto log data (High/low altitudes, cumulative ascent and descent) Others: Relative altitude readings (±100m /±1000m), Selectable measurement interval: 5 seconds or 2 minutes *1 second for first 3 minutes only *Changeover between meters (m) and feet (ft)
Barometer Display range: 260 to 1,100 hPa (7.65 to 32.45 inHg) Display unit: 1 hPa (0.05 inHg) Hand indication of pressure differential Atmospheric pressure tendency graph Barometric pressure tendency information alarm (beep and arrow indicates significant changes in pressure) *Changeover between hPa and inHg
Digital compass Measures and displays direction as one of 16 points Measuring range: 0 to 359° Measuring unit: 1° 60 seconds continuous measurement Hand indication of north Bidirectional calibration Magnetic declination correction
Thermometer Display range: -10 to 60℃ (14 to 140℉) Display unit: 0.1℃ (0.2℉) *Changeover between Celsius (℃) and Fahrenheit (℉)

Sapphire crystal with glare-resistant coating
Screw Lock Crown

World time
World time 29 time zones (29 cities + coordinated universal time), daylight saving on/off, Home city/World time city swapping
1/100-second stopwatch Measuring capacity: 23:59'59.99'' Measuring modes: Elapsed time, split time, 1st-2nd place times
Countdown timer Measuring unit: 1 second Countdown range: 60 minutes Countdown start time setting range: 1 second to 60 minutes (1-minute increments)
Alarm/hourly time signal
5 daily alarms
Hourly time signal
Double LED light LED light for the face (Full auto LED light, selectable illumination duration, afterglow) LED backlight for the digital display (Full auto LED light, selectable illumination duration, afterglow)
Light color
Full auto-calendar (to year 2099)
Mute feature
Button operation tone on/off
Hand home position correction feature
The auto hand home position correction
Energy saving feature
Power Saving (display goes blank and hands stop to save power when the watch is left in the dark)
Battery display/alert
Battery level indicator
Run time
Approx. battery operating time: 6 months on rechargeable battery (operation period with normal use without exposure to light after charge) 25 months on rechargeable battery (operation period when stored in total darkness with the power save function on after full charge)
Accuracy: ±15 seconds per month (with no signal calibration)
Other features
12/24-hour format
Hand shift feature (manual or auto (during altitude, barometric pressure, and temperature measurement))
Regular timekeeping: Analog: 3 hands (hour, minute (hand moves every 10 seconds), second) Digital: Hour, minute, second, am/pm, month, date, day
Time adjustment details
Time Calibration Signals Station name: DCF77 (Mainflingen, Germany) Frequency: 77.5 kHz Station name: MSF (Anthorn, England) Frequency: 60.0 kHz Station name: WWVB (Fort Collins, United States) Frequency: 60.0 kHz Station name: JJY (Fukushima, Fukuoka/Saga, Japan) Frequency: 40.0 kHz (Fukushima) / 60.0 kHz (Fukuoka/Saga) Station name: BPC (Shangqiu City, Henan Province, China) Frequency: 68.5 kHz
Time calibration signal reception Auto receive up to six* times a day (remaining auto receives canceled as soon as one is successful) *5 times a day for the Chinese calibration signal Manual receive The latest signal reception results



Built to prevent intrusion by sand,
mud or dust and to ensure reliable operation in the harshest environments,
this tough structure is prepared to support training
and actual missions in environments such as jungles and deserts.
It's an ideal tool for rangers and rescue crews.



A cylindrical guard structure is adopted for all the buttons, and the cylindrical button shafts are fitted with gasket linings. This structure not only protects the buttons against intrusion by dust and mud, but it also helps to alleviate shocks. The crown is also protected by a highly airtight screw-lock structure. Gaskets are installed at points where the crown meets the surface of the case to assure superior resistance to dust and mud.


Dual mud-resistant structures for further enhanced strength

Mud-resistant screw-lock structure

Mud-resistant screw-lock structure

  • Button pipes: The pipes guard against intrusion by mud and alleviate lateral shocks.
  • Gaskets: Gaskets installed inside the cylinders and button shafts increase their airtightness.
  • Air vents: Air vents positioned in the base of the button shafts prevent button malfunctions due to changes in air pressure.
Mud-resistant button guard structure

Mud-resistant button guard structure

  • Gasket: A gasket is inserted between the crown and case to assure airtightness.
  • Lock/release marking: A red marking permits visual verification of the crown's lock/release status.

Vibration-resistant structure

αGEL® (Alpha Gel) is packed under
and around the module to
protect the watch from malfunctions
or damage due to vibrations.
Washers securing the lug screws help
prevent vibrations from loosening the band.

* A soft gel material with silicone
as its main component featuring superior
vibration-absorption capabilities.
* αGEL® is a registered trademark of Taica Corporation.


Built-in sensors that measure directions,
atmospheric pressure/temperatures and altitudes quickly
and precisely achieve precision performance under the harshest conditions.

Digital Compass

Digital Compass



Barometer / Thermometer

Barometer / Thermometer

*The color tone of the listed products may differ from the actual product in some cases.

Select a location